Weight elevator for pulling machines



I 1,626,114 P" 1927' L. CHAMBERLAIN WEIGHT ELEVATOR FOR PULLING MACHINESFiled Anril 22. 1936 I H I [N VEN TOR.

ATTORNEY.

Patented Apr. 26, 1927.

tlhll-TED STATES LEROY CHAMBERLAIN, OF WICHITA FALLS, TEXAS.

WEIGHT ELEVATOR FOR PULLING MACHINES.

Application filed April 22, 1926.

This invention relates to well drilling equipment and more particularlyto portable types of drilling and pulling machines, and the primaryobject of the invention re sides in the provision of an arrangement,coacting with the operating machinery of such machines in assembling andpulling rods and tubing, whereby to avoid the necessity of constantoperation of the machinery and to thereby alleviate the burden imposedthereon.

lVith the foregoing and other objects and advantages in view, theinvention resides in the salient features of construction andarrangement of parts hereinafter defined in detail and illustrated inthe accompanying drawings wherein,

Figure 1 is a fragmentary representation of a casing pulling or drillingmachine, in elevation.

Figure 2 represents a plan view of the usual drum construction.

Figure 3 is a vertical cross sectional view of the mast, showing theweight therein, and

Figure 1- is a modified exemplification of the manner in which the cablesheave may be mounted in the mast.

Heretofore, in assembling rods, tubing and the like in wells, it wasnecessary that the machinery be almost constantly oper ated both forwardand reverse to maintain control of the lines in lifting the said rodsand tubing into position and lowering the same. 1

lVith this in View, particular attention is directed first to Figure 1,in which partial representation of a pulling machine 1 is shown, havinga mast 2 of the usual tubular construction. This mast is collapsibleupon the machine 1, from which position it is elevated for use to theposition shown in the figure by suitable mechanism, not shown, norforming a part of the present invention. A crown sheave 3 is mounted atthe top of this mast, and about which a line 4 is passed, which latterhas an end wound about the main drum 5, shown in Figure 2, while theopposite end thereof is used for handling tubing, rods, and the like.

In Figure 2, a plan view of the inclusive drum arrangement, the drum 5,not de parting materially from the conventional drum structure, is fixedto the shaft 5, as is likewise the shorter drum 6, the latter beingpreferably situated outside the frame Serial No. 103,871.

1 of the machine. While no restrictions are intended as to structure, aratchet 6 is shown, particularly in Figure 2, which is also fixed to theshaft 5, and is engageable by the pawl 7, pivoted to the side of theframe 1. This pawl and ratchet mechanism, while in the present case isshown as being hand operated, may be of course modified so as to controlthe shaft 5 and drums 5 and 6 from other points on the machine by footlevers or other such means.

The line 4, which is the line used for handling various tools and thelike, is wound upon the main drum 5 in a reverse manner to the positionof the line 8 upon the drum 6, the reasons for which will be set forthpresently.

Adjacent the top of the mast 2 a slot 9 is cut as shown, and in which asheave 10 is adapted to be partially inserted, and held therein bybracket 11. The line 8 is mounted over this sheave and a weight member12 is swung thereon by a pulley 13, after which the line 8 is secured toan eye bolt 14 in the wall of the mast 2, opposite the pulley 10, as inFigure 3. V The weight member 12 is of course selected to outweigh thebodies attached to the line l. Accordingly and in operation, the lines 4and 8, being wound in a reverse manner about their respective drums 5and 6, move in opposite directions, hence, an object attached to theoperative end of the line 4 would move upward, simultaneous with adescending movement of the weight 12 within the mast 2, and vice versa.

A casing elevator or other type of grapple or hook may be applied to theend of the line i, and in lowering casing, tubing, rods or suchequipment into the well for example, the elevator is engaged with thebody to be lifted, and when the pawl T is released from the ratchet 6",the weight 12, being of greater weight than the body, would obviouslydescend within the mast, thus elevating the body to a position wherebyit may be accessibly urged into the hole by an attendant. This movementis entirely controlled by the weight 12, no operation of the motor, notshown, is required. However, in order to return the weight 12 to the topof the mast 2, the motor must be operated.

It is readily apparent that through the assembly shown, operation of themachinery is reduced to a minimum, thereby rendering possible a materialsaving both in time and expense resulting from possible deterioration ofmachinery through constant operation under other conditions.

Figure 4t of the drawingsillustrates a modified example of the structuredescribed, in that. the tying of the cable 8 tothe eye 13 is dispensedwith. In this latter instance, the position of the bracket 11 isreversed and bolted as shown, thereby to dispose the pulley 13 nearerthec enter of the mast 2. The line 8 then placed over the pulley asbefore and securely ailizred to the weight member 12 as illustrated.

hile specific details of structure and function have been set outherein, itis not desired that the invention be limited thereto, and thatcertain changes and modifications may be resorted to without departingfrom the spiritand intent of the invention as set imrth in theiolloi'ving claims.

I claim:

1. In a pulling and drilling machine; a weight elevator comprisingincombination with a hollow tubular mast and a pair of drums, a pulleymounted near the top of said inast, a line fwound about one of saiddrums and passing about said pulley a weight supported by said lineinteriorly of the mast; a second line wound in a reverse manner aboutthe other oi said drums and passing over a pulley on the top of saidmast; means for holding said drums against rotation, and meansforreleaslng said holding means to ,JQ'LililbilllQ said weight to belowered within the mast to elevate a body engaged by said second line. v

2. In a pulling and drilling machinepa weight elevator comprising incombination with a hollow tubular mast and a pair of drums; a pulleymounted on the top of said mast; a pulley mounted adjacent the top ofsaid mast with its body extending partially within said mast; a cablehaving one of its ends wound about one of said drums and passing overthe first pulley exteriorly of said mast; a second line having one 01'its ends wound in reverse inanner about the other of said drums andextending over the second pulley andsecured to the wall of said mast; aweight member having a pulley thereon arranged to ride on said secondline intermediate said second pulley and said securing point; ineanstohold said drums against rotation, and means to release said holdingmeans to permit said weight to descend within the mast to elevate a bodycarried by said first line.

3. In a pulling machine for rods and tubing, a weight elevator includingin comb'in'a'tion with "a hollow mast and a pair of drums, a pulley onthe top of said mast; a pulley below said first pulley having its bodypartially extending into said mast; ai line woundabou't one of saiddrums and extendingover said firstpulley eXteriorly of said inastgasecond line wound in reverse relationship about the other of said drumsand extending over said second pulley; a weight carried by said secondline interior-1y of said mast; a 'conin'ion holding means for saiddrums, and means to release said liolding means,,to permit said weightto descend, to. exteitiorly elevate an object cair'ie'd by said firstline.

Ina pulling machine for rods'and tubing having a. hollow mast structure;a weight member in said mast, in combina tion with a pair of rotatabledrums; a pulley nounted on the top or said mast, and a second pulleymounted below said first pulley; a line passing about said first pulleyhaving its end secured to one of said drums; a second line carried bysaid second pulley having its endsecured to the other of said driuns andarranged to support said weight member interlOrly of said niastaan dmeans to control the movement of said drums to permit said weight todescend in said mast to elevatean object on said first line,

'5. In a pulling machine for rods, tubing and the like, havingahollowmast structure in combination with a pair of drums; a weight interiorlyfoi said mast structure; a line supporting said weight and havingits opposite end wound about one of said drums; a second line reverselywound about the other of said drums and extending over the top of saidmast, and in'ea'ns to control the movenientof said dri n'is to permitsaid weight to be lowered within said 'mast to effect raising oi saidsecond line to elevate an object carried thereby. l p

In testimony whereof I my signature.

LEROY CHAMBERLAIN.

